Sr20det Main Bearing Order? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Dsmguy1993 · 09-24-2019, 01:45 AM

Okay so i have already figured out my sr block needs grades 4,4,4,2,2 I did this by adding the crank numbers with the block numbers. My question is starting from the main bearing on the front of the engine what order does it go in? Is it 4,4,4,2,2 starting from the front main bearing by the oil pump? Or is it the opposite?

S14rebuild · 09-24-2019, 05:12 AM

Always start at the front of the engine.. thats why its called the front..

jedi03 · 09-24-2019, 08:27 AM

I would suggest measure your crank and mains to make sure they haven't been reground at some time in the past...is rare if you bought directly from jdm importer but higher likely hood of happening if bought off someone who used it before you

Dsmguy1993 · 09-24-2019, 10:23 AM

Thank you I appreciate your input. Yes this crank Im using has never been ground it came from a good block and I have that same good block im using it to replace an old sr shortblock and crank.

*brndck* · 09-24-2019, 11:37 AM

def still measure the old bearings and compare to the new bearings when they arrive, and still plastigauge everything

*TheRealSy90* · 09-25-2019, 02:36 PM

Isn't there a better way to measure for bearings than plastigauge? Seems really old school.

S14rebuild · 09-25-2019, 03:33 PM

Micrometer

jedi03 · 09-26-2019, 10:47 AM

plastiguage is actually the new method afik...micrometer is much more accurate and definitely less work imo...3 measurements and make sure you learn from someone who does it on a regular basis...also no oil on it as it can throw off measurements!

09-24-2019, 01:45 AM	#1
Dsmguy1993 Leaky Injector Join Date: Aug 2019 Location: Illinois Age: 27 Posts: 135 Trader Rating: (0) Feedback Score: 0 reviews	Sr20det Main Bearing Order? Okay so i have already figured out my sr block needs grades 4,4,4,2,2 I did this by adding the crank numbers with the block numbers. My question is starting from the main bearing on the front of the engine what order does it go in? Is it 4,4,4,2,2 starting from the front main bearing by the oil pump? Or is it the opposite?

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09-24-2019, 05:12 AM	#2
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Always start at the front of the engine.. thats why its called the front..

09-24-2019, 08:27 AM	#3
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,786 Trader Rating: (8) Feedback Score: 8 reviews	I would suggest measure your crank and mains to make sure they haven't been reground at some time in the past...is rare if you bought directly from jdm importer but higher likely hood of happening if bought off someone who used it before you

09-24-2019, 10:23 AM	#4
Dsmguy1993 Leaky Injector Join Date: Aug 2019 Location: Illinois Age: 27 Posts: 135 Trader Rating: (0) Feedback Score: 0 reviews	Thank you I appreciate your input. Yes this crank Im using has never been ground it came from a good block and I have that same good block im using it to replace an old sr shortblock and crank.

09-25-2019, 03:33 PM	#7
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Micrometer

09-26-2019, 10:47 AM	#8
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,786 Trader Rating: (8) Feedback Score: 8 reviews	plastiguage is actually the new method afik...micrometer is much more accurate and definitely less work imo...3 measurements and make sure you learn from someone who does it on a regular basis...also no oil on it as it can throw off measurements!